BlockMessage{ }
BlockMessage{ }
writeImpl{
  io.netty.buffer.ChannelBuffer.writeInt
  io.netty.buffer.ChannelBuffer.writeInt
  io.netty.buffer.ChannelBuffer.writeBytes
}
readImpl{
  io.netty.buffer.ChannelBuffer.readInt
  io.netty.buffer.ChannelBuffer.readInt
  io.netty.buffer.ChannelBuffer.readBytes
}
toString{ }
